<!DOCTYPE html>
1. Print an iframe with display: none;<br>
2. Print an iframe under a parent iframe with display: none.<br>
Should not crash and the print preview should show table borders around "AAA".
<iframe style="display: none"
    srcdoc="<table id=ttt border=1><td>AAA</td><table>
            <iframe srcdoc='<table id=ttt border=1><td>AAA</td></table>'></iframe>">
</iframe>
<br><button onclick="frames[0].print()">Manual test 1</button>
<br><button onclick="frames[0].frames[0].print()">Manual test 2</button>
